But as I had no powers of observation at all -- as usually I would know neither the name or specific nature of the things that I happened to see -- and understanding only that when they had some connection to the Swanns they became extraordinary -- it did not seem by any means certain that, in drawing my parents' attention to the artistic value and the remote origins of the staircase, I was lying to them. (my very loose translation...)

Perhaps this is because, for Proust, the details of things are always mimetic, always expressive of somebody or a relationship to that somebody -- and so expressive too of the disturbing power of the mores that buffer them stiffly there, that the particularities of those objects are at the same time 'exigées par l'étiquette et particulière aux Swann'.